Initially, the company wrote that the platform was unavailable only “to some users” and apologized for the inconvenience, without specifying a cause for the outage.After remaining inaccessible to users for a little over two hours, the exchange announced it is back up and running with full functionality.Bitfinex is currently the world’s 18th largest crypto exchange by adjusted daily trade volumes.More recently, Canadian crypto exchange QuadrigaCX has become embroiled in controversy following the sudden death of its CEO. According to the exchange, the firm has lost access to users’ funds — allegedly stored on cold wallets — because its CEO was the only person with access to them.